Telephone set



FIG. 1 is a left side, partial top, and front isometric view of a telephone set showing my new design;

FIG. 2 is a right side elevational view thereof, taken from the direction of arrow II of FIG. 1; and

FIG. 3 is a rear elevational view thereof, taken from the direction of arrow III in FIG. 1. 

The ornamental design for a telephone set, as shown. 